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All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...

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Hemangioblasts are multipotent stem cells originating from the mesoderm. They give rise to hematopoietic stem cells (HSCs), which undergo hematopoiesis to produce all the formed elements of blood. This process is regulated by a complex network of hematopoietic growth factors, including transcription factors, growth factors, and cytokines. These factors stimulate the HSCs to divide and differentiate, though some HSCs remain undifferentiated to maintain a self-renewing pool.
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Updated: Jul 5, 2026

Isolation Method for Long-Term and Short-Term Hematopoietic Stem Cells

Isolation Method for Long-Term and Short-Term Hematopoietic Stem Cells

Published on: May 19, 2023

Stem cells and aging in the hematopoietic system.

Luigi A Warren¹, Derrick J Rossi

¹Department of Pathology, Harvard Medical School, Harvard University, Boston, MA 02115, USA.

Mechanisms of Ageing and Development

|May 16, 2008

Summary

Hematopoietic stem cells (HSCs) maintain blood cell production throughout life. DNA repair, ROS management, and telomere maintenance are vital for HSC longevity and function, with aging impacting their differentiation and potentially immune response.

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Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors

Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors

Published on: July 8, 2012

Area of Science:

Hematology
Stem Cell Biology
Immunology
Gerontology

Background:

Hematopoietic stem cells (HSCs) in bone marrow continuously replenish short-lived blood effector cells.
While HSC replicative potential may be finite, replicative senescence is not a primary cause of stem cell pool depletion in normal lifespans.
Aging impacts HSCs, leading to a shift towards myeloid differentiation and a decline in lymphopoiesis.

Purpose of the Study:

To investigate factors critical to hematopoietic stem cell (HSC) longevity and stress response.
To explore the age-related changes in HSC differentiation and their implications for immune function.
To identify future research directions in HSC aging, including lineage skewing and epigenetic dysregulation.

Main Methods:

Analysis of murine genetic models with defects in DNA repair, reactive oxygen species (ROS) management, and telomere maintenance.
Observation of HSC differentiation patterns in aging models.
Review of existing evidence on HSC replicative potential and senescence.

Main Results:

DNA repair, ROS management, and telomere maintenance pathways are crucial for HSC longevity and stress response.
Aging HSCs exhibit an increased tendency to differentiate into myeloid lineages.
This age-related 'lineage skewing' may contribute to the decline in lymphopoiesis observed with aging.

Conclusions:

The integrity of DNA repair, ROS management, and telomere maintenance is essential for maintaining a functional HSC pool.
Age-associated alterations in HSC differentiation, particularly lineage skewing, are significant and may underlie age-related immune dysfunction.
Future research should focus on the impact of lineage skewing on immunity and the role of epigenetic changes in HSC aging.